RTK corrections in Bulgaria, on 2+ networks across the country
RTK Premium delivers network RTK corrections in Bulgaria in ETRS89 (ETRF2000, epoch 2010.0) over standard NTRIP. In a fixed solution it reaches under 1.5 cm horizontally and 2.5 cm vertically. 2+ networks serve all 28 districts, so smart failover takes over when a network drops, and the 99.9% monthly service level applies in the Eligible Area the coverage map shows. A 14-day free trial comes first.
RTK Premium in Bulgaria
| Coverage | 2+ networks in all 28 districts; check your site on the coverage map |
|---|---|
| Frame | ETRS89 (ETRF2000, epoch 2010.0), ellipsoidal heights |
| Accuracy | Under 1.5 cm horizontal, 2.5 cm vertical, in a fixed solution |
| Service level | 99.9% monthly availability for RTK Premium in the Eligible Area the coverage map shows, with a refund of the monthly fee when a month falls short |
| Trial | 14 days on your own receiver; your account arrives by email within two working hours |
| Price | Priced per device and term. Request pricing |
| Support | Business days, 10:00 to midnight Bulgarian time |
| Stream | RTCM 3.x over NTRIP; caster rtkpremium.xyz, port 2101, mountpoint COMMON |
Check it before you commit
Setup guides
More than 100 step-by-step guides cover receivers, controllers, drones and machine control.
Test it yourself
RTKTEST.com compares up to three correction services against a surveyed point in one 15-minute session, and the 14-day trial runs on your own receiver at your own sites.
Correction services in Bulgaria
Bulgarian crews choose between commercial network RTK, crowd-sourced base stations, satellite-delivered corrections and their own base.
| Type | Typical operator | What to check |
|---|---|---|
| Commercial network RTK | Private providers; the national mapping agency assesses the conformity of GNSS infrastructure networks that distribute BGS2005. | How many correction sources serve your area, the published service level and its remedy, the term, and whether a trial is offered. |
| Crowd-sourced network | Independent owners hosting single base stations. | Distance to the nearest base, station uptime, and how each base was surveyed. |
| Satellite or state-space (PPP-RTK, SSR) | A provider broadcasting an error model without a local base. | Convergence time, accuracy and vertical performance. |
| Your own base | Your crew, on a surveyed point. | The survey of the base point, range, and the time spent setting it up and guarding it. |
Coordinates and heights
RTK Premium delivers ETRS89 (ETRF2000, epoch 2010.0), with ellipsoidal heights. The Bulgarian Geodetic System 2005 (BGS2005) realises ETRS89 in ETRF2000 at epoch 2005.0, and the two realisations can differ slightly. Cadastral and large-scale survey data use the Cadastral Coordinate System 2005, a Lambert conformal conic projection, and smaller-scale maps use UTM zones 34 and 35. BGS2005 heights refer to the European vertical system in its EVRF2007 realisation, so convert ellipsoidal heights with the national mapping agency's height reference surface, a grid built from the European geoid model and national GPS and levelling data. Older material in the 1970 coordinate system and Baltic heights moves into BGS2005 through the agency's official transformation software, BGSTrans. Check against a national control point before cadastral or control work.
Setup
- Start the 14-day free trial on this site, or order a subscription. Your account arrives by email within two working hours.
- Enter the caster rtkpremium.xyz, port 2101 and mountpoint COMMON in your controller or receiver, with the username and password from your account.
- Measure a control point you trust before the job starts, and compare the result with its published coordinates in your project's frame.
Industries using precise positioning or RTK corrections in Bulgaria
Wheat: Bulgaria's wheat harvest reached 6,846 thousand tonnes from 1,194,342 hectares in 2024. Drilling, spraying and harvest guidance on that land depend on a correction that holds pass after pass. (National Statistical Institute of Bulgaria (NSI), Bulgaria 2025, 2024)
Sunflower: Sunflower crops reached 929,079 harvested hectares in Bulgaria in 2024, the largest area after wheat among the country's main crops. Row crops are drilled and hoed along guidance lines that have to repeat from season to season. (National Statistical Institute of Bulgaria (NSI), Bulgaria 2025, 2024)
Rail: Bulgaria's railway lines measured 5,445 km of track, sidings included, in 2024, and 73.6% of that track was electrified. Track renewals and line upgrades are measured against design to the centimetre. (National Statistical Institute of Bulgaria (NSI), Bulgaria 2025, 2024)
Forestry: Bulgaria's total forest area was 4,283 thousand hectares in 2024. Forest roads, planting and boundary surveys on that land are set out from surveyed points. (National Statistical Institute of Bulgaria (NSI), Bulgaria 2025, from Executive Forest Agency data, 2024)
Questions about RTK in Bulgaria
Which RTK correction service serves Bulgaria?
RTK Premium covers Bulgaria with 2+ networks in all 28 districts and a 99.9% monthly service level in the Eligible Area, and the coverage map shows the networks at any site.
Is there a free RTK network in Bulgaria?
Community networks run free single base stations of varying quality, and commercial networks sell subscriptions. Check what each source commits to on availability and support before you rely on it.
Which frame and heights should RTK corrections use in Bulgaria?
Use ETRS89, then project to the Cadastral Coordinate System 2005 for cadastral and large-scale work, or to UTM zone 34 or 35 for smaller-scale maps, and convert to BGS2005 heights with the national height reference surface.
How do I bring 1970-system data into BGS2005?
Use BGSTrans, the national mapping agency's official software for transforming material and data into BGS2005. Check the result against a national control point before cadastral work.
How much does RTK Premium cost in Bulgaria?
Prices depend on the number of devices, the term and the product, and we quote them after a short call. The 14-day trial needs no payment.
How accurate is RTK in Bulgaria?
In a fixed solution under good conditions, RTK Premium reaches under 1.5 cm horizontally and 2.5 cm vertically.
Can I try RTK Premium before I buy?
Yes. The trial runs for 14 days on your own receiver, with full access to the RTK Premium network.
Last updated: 12 November 2026
Try RTK Premium in Bulgaria
Run the 14-day trial at your own Bulgarian sites, in BGS2005 with the national height reference surface applied, before you commit to a plan.
